Daniel 5:30

Belshazzar : the deputy king of Babylon after Nebuchadnezzar

Daniel 8:1

Belshazzar : the deputy king of Babylon after Nebuchadnezzar

Daniel : the prophet who wrote the book of Daniel,son of David and Abigail,head of clan (Ithamar Levi) who pledged to obey God's law,prophet who wrote the book of Daniel